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我有一個使用Oracle數據庫的應用程序，它使用c3p0和hibernate。 升級到Hibernate 4後我得到一個異常從Oracle 10g遷移到11g驅動程序後無法打開連接
java.lang.AbstractMethodError: Method oracle/jdbc/driver/T4CPreparedStatement.setBinaryStream(ILjava/io/InputStream;J)V is abstract at oracle.jdbc.driver.T4CPreparedStatement.setBinaryStream(T4CPreparedStatement.java)
at oracle.jdbc.driver.T4CPreparedStatement.setBinaryStream(T4CPreparedStatement.java) ~[ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.5.0"]
at sun.reflect.GeneratedMethodAccessor257.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_40]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_40]
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.setBinaryStream(NewProxyPreparedStatement.java:2133) ~[c3p0-0.9.2.jar:0.9.2]
at org.hibernate.type.descriptor.sql.BlobTypeDescriptor$5$1.doBind(BlobTypeDescriptor.java:147) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.type.descriptor.sql.BlobTypeDescriptor$2$1.doBind(BlobTypeDescriptor.java:103) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:90) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:286) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:281) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:56) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2843) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3121) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3581) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:104) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:465) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:351) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:56) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1258) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
所提出的解決方案是從10G升級Oracle驅動程序到11g。爲此，我用ojdbc6.jar替換了ojdbc14.jar（實際上是用於調試符號的ojdbc6_g.jar）。之後應用程序不啓動任何更多與異常
org.hibernate.exception.GenericJDBCException: Could not open connection
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:235) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:67) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:162) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1471) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106) ~[mchange-commons-java-0.2.3.3.jar:na]
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:677) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:134) ~[c3p0-0.9.2.jar:0.9.2]
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:380) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:228) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
... 27 common frames omitted
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1406) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:594) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:514) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:743) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:670) ~[c3p0-0.9.2.jar:0.9.2]
... 31 common frames omitted
我看不出不從的Oracle 11g驅動程序從C3P0什麼都不是。 看來這是由於C3P0 0.9.2使用log4j的，而不是SLF4J，所以加入的log4j-過SLF4J後，我可以看到Oracle驅動程序拋出一個異常，這是C3P0記錄作爲警告（原文如此！）
WARN com.mchange.v2.resourcepool.BasicResourcePool - com[email protected]412960b2 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: ORA-00604: error occurred at recursive SQL level 1
ORA-01882: timezone region not found
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:459) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:392) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:384) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIfun.processError(T4CTTIfun.java:767) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIoauthenticate.processError(T4CTTIoauthenticate.java:450) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:539) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:235) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:382) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:822) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:477) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:564) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:251) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:29) ~[ojdbc6_g.jar:11.2.0.4.0]
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:563) ~[ojdbc6_g.jar:11.2.0.4.0]
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:183) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:172) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:188) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1074) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1061) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1798) ~[c3p0-0.9.2.jar:0.9.2]
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:636) [mchange-commons-java-0.2.3.3.jar:na]
通過將參數-Duser.timezone=GMT提供給啓動JRE的命令可以解決此問題。但問題是爲什麼我在Linux上運行Java 8必須這樣做？我的時區正確設置：
$ date +'%:z %Z'
+03:00 EEST
爲什麼我必須另外設置一個變量？
您是否正在使用JRE 6或以上版本？ –
你已經仔細檢查了你連接的11g版本（11gR1/2 +次要版本）是否有正確的'ojdbc6_g.jar'？ –
我可以建議的最後一件事是檢查'ojdbc6_g.jar'肯定是在應用程序的類路徑中。 –